[try 2] [1/3] dsound: Add support for 32-bit IEEE float buffers

[Owen Rudge]

Try 2:

- clamp source values to between -1.0 and 1.0
- fix test failure on Win98 (IEEE float buffer creation does succeed on 
DX<8, but doesn't play properly unless you use Win2K)

---
  dlls/dsound/dsound.c         |    2 +-
  dlls/dsound/dsound_convert.c |   62 
+++++++++++++++++++++++++++++++++++++++++-
  dlls/dsound/dsound_private.h |    2 +-
  dlls/dsound/mixer.c          |   20 ++++++++++++-
  include/mmreg.h              |    1 +
  5 files changed, 82 insertions(+), 5 deletions(-)


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